Former Chelsea forward Joe Cole says he "feels sorry" for Arsenal boss Mikel Arteta.
Cole insists questions should be asked of technical director Edu.
“The one person I feel sorry for in all this is Mikel Arteta," he told BT Sport. "Because he looks like a great coach and it looks like there is some kind of system he is trying to implement.
“We know David Luiz has been a top player and won everything in the game, but the performances this season, I don't know who's taking the decision to make him another year's contract."
"Arguably one of their biggest games of the season, Arteta left him out."
He added: “For me that's a big signal, he's left his most experienced player out of the biggest game against Man City – and then you give him another years contract. [It's] muddled thinking.
“Cedric – if you're looking to go and compete with Liverpool and Chelsea and you go and sign a 29-year-old full-back who's arguably not played at that level where he's regularly competing against top sides, and you're asking him make a difference, then giving him a four-year contract.
“If I'm an Arsenal fan, I would be asking questions of Edu and the people making these decisions. I feel sorry for Arteta because he's got a lot of promise as a young coach."
